Paul Thurrott has posted a fine article on fixing Windows 8.
He basically is joining the chorus of bloggers (me included) who have said that it makes no logical sense to deny customers the right to log in directly into a product they have paid for.
He sums it up pretty well.
You should also be able to choose between the Start screen and the desktop in PC Settings at any time.
It’s just customer-centric common sense.
I couldn’t agree more.